scholarly journals Efficient full-path optical calculation of scalar and vector diffraction using the Bluestein method

2020 ◽  
Vol 9 (1) ◽  
Author(s):  
Yanlei Hu ◽  
Zhongyu Wang ◽  
Xuewen Wang ◽  
Shengyun Ji ◽  
Chenchu Zhang ◽  
...  
Keyword(s):  
Vector Diffraction ◽  
Optical Calculation

Optical calculation of correlation filters

1990 ◽  
Author(s):  
Jerome Knopp ◽  
Stanley E. Monroe, Jr.
Keyword(s):  
Correlation Filters ◽  
Optical Calculation

scholarly journals Tracing the evolution of morphology and mixing state of soot particles along with the movement of an Asian dust storm

2020 ◽  
Author(s):  
Liang Xu ◽  
Satoshi Fukushima ◽  
Sophie Sobanska ◽  
Kotaro Murata ◽  
Ayumi Naganuma ◽  
...  
Keyword(s):  
Regional Climate ◽  
Microscopic Analysis ◽  
Asian Dust ◽  
Urban Site ◽  
Dust Event ◽  
The East China Sea ◽  
Soot Particles ◽  
New Findings ◽  
Optical Calculation ◽  
Aerosol Types

Abstract. Tracing the aging progress of soot particles during transport is highly challenging. An Asian dust event could provide an ideal opportunity to trace the continuous aging progress of long-range transported soot particles. Here, we collected individual aerosol particles at an inland urban site (T1) and a coastal urban site (T2) in China and a coastal site (T3) in southwestern Japan during an Asian dust event. Microscopic analysis showed that the number fraction of soot-bearing particles increased from 19 % to 22 % from T1 to T2 in China but surprisingly increased to 56 % at T3 in Japan. The dominant fresh soot (71 %) at T1 became partially embedded (70 %) at T2 and fully embedded (84 %) at T3. These results indicated that the soot particles had lower deposition than other aerosol types and became more aged from T1 to T3. The fractal dimension of the soot particles slightly changed from 1.74 at T1 and 1.78 at T2 but significantly became 1.91 at T3. We found that the soot morphology compressed depending on secondary coating thickness and relative humidity. Moreover, we observed a unique mixing structure at T3 that tiny soot particles were seemly broken from large ones cross the East China Sea and distributed in organic coatings instead of sulfate core in particles. Our study provide important constraints of the morphological effects to better understand changes of microscopic structures of soot. These new findings will be helpful to improve optical calculation and modeling of soot particles and their regional climate effects in the atmosphere.

Fabrication of Subwavelength Metal Grating and Analysis with Vector Diffraction Theory

2013 ◽  
Vol 34 (7) ◽  
pp. 935-939
Author(s):  
郑改革 ZHENG Gai-ge ◽  
詹煜 ZHAN Yu ◽  
曹焜 CAO Kun ◽  
徐林华 XU Lin-hua
Keyword(s):  
Diffraction Theory ◽  
Vector Diffraction Theory ◽  
Metal Grating ◽  
Vector Diffraction

Analysis of pinhole vector diffraction in visible light

2012 ◽  
Author(s):  
Li Wang ◽  
ChangHui Rao ◽  
XueJun Rao ◽  
JinSheng Yang
Keyword(s):  
Visible Light ◽  
Vector Diffraction

TO-LO Splitting in Infrared Spectra of Thin Films

1996 ◽  
Vol 50 (6) ◽  
pp. 759-763 ◽  
Author(s):  
Kiyoshi Yamamoto ◽  
Akio Masui
Keyword(s):  
Thin Films ◽  
Infrared Spectra ◽  
Molecular Orientation ◽  
Peak Position ◽  
Peak Shape ◽  
Surface Phenomena ◽  
Longitudinal Optic ◽  
Transverse Optic ◽  
Optical Behavior ◽  
Optical Calculation

The importance of transverse optic-longitudinal optic (TO-LO) splitting in the interpretation of infrared spectra of thin films is experimentally presented. When infrared spectra are observed at oblique angles of incidence, the shifts in peak position and/or the changes in peak shape may be due to TO-LO splitting. Before one assigns the optical behavior to surface phenomena such as molecular orientation, proper care must be employed. The proposed technique includes optical calculation to extract surface phenomena from TO-LO splitting in the spectra, and it is applied to reflection absorption spectra of perfluoropolyether.

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